If you're over 30 your chances for developing periodontal (gum) disease are better than half. And it's not a minor matter—untreated gum disease can lead not only to tooth loss, but to an increased risk of cardiovascular disease and other inflammatory conditions.

Fortunately, we have effective ways to treat gum disease, even in advanced stages. But the best approach by far in avoiding a devastating outcome for your teeth is to prevent gum disease from developing in the first place.

It helps first to know how gum disease begins. The most common cause is dental plaque, a thin biofilm of food particles on tooth surfaces that harbors the bacteria that triggers the disease. If you keep your teeth clean of built-up plaque and tartar (calcified plaque) with daily brushing and flossing and regular dental cleanings, you'll minimize the growth of disease-causing bacteria.

If you don't practice effective oral hygiene, however, within a few days you could develop an initial infection called gingivitis. This form affects the outermost layers of the gums and triggers a defensive response from the body known as inflammation. Ordinarily, inflammation helps protect surrounding tissues from infection spread, but it can damage your gums if it becomes chronic. Your weakened gums may begin to detach from the teeth, forming voids filled with inflammation known as periodontal pockets. Eventually, the infection can spread to the supporting bone and lead to tooth loss.

In addition to a dedicated oral hygiene and dental care program, you should also be on the lookout for early signs of gingivitis. Infected gums can become red, swollen and tender to the touch. You may notice they bleed easily while brushing and flossing, or a foul taste or breath that won't go away even after brushing. And if some of your teeth feel loose or don't seem to bite together as they used to, this is a sign of advanced gum disease that deserves your dentist's immediate attention.

Practicing preventive hygiene is the best way to stop gum disease before it starts. But if gum disease does happen, catching it early can be a game-changer, both for your teeth and your smile.